| Value | Category |
|---|---|
| 1 | A |
| 2 | A (3 000 to about 15 000 people) |
| 3 | A |
| 4 | A |
| 5 | Close to the centre of a |
| 6 | Elsewhere in a |
| 7 | |
| 8 | |
| 9 |